snow chains PORSCHE BOXSTER 2005 2.G Owners Manual

Controls, Instruments
59
Examples of PSM control operations
– If the “front wheels of the vehicle drift” on a
bend, the rear wheel on the inside of the bend
is braked and the engine power is reduced if
necessary.
– If the rear of the vehicle swings out on a bend,
the front wheel on the outside of the bend is
braked.
PSM should always be switched on during
“normal” driving.
However, it may be advantageous to switch off
PSM temporarily in exceptional situations, for
example:
– On a loose surface or in deep snow,
– When “rocking the vehicle free”, or
– When using snow chains.
Tiptronic vehicles
When the PSM is switched off the slip monitoring
function of the Tiptronic is also deactivated.
Switching off PSMfPress the PSM OFF button.
PSM is switched off after a short delay.
The light-emitting diode in the button is illumi-
nated.
When the PSM is switched off, the multifunc-
tional PSM light on the instrument panel is lit
and a message is shown by the on-board
computer.
A gong also sounds.The following functions stabilise the vehicle in
emergency situations, even with PSM switched
off:
– When PSM is off, the vehicle is stabilised as
soon as one of the two front wheels enters the
ABS control range.
– When PSM is off and Sport mode is on, the
vehicle is stabilised as soon as both front
wheels enter the ABS control range.
One-sided spinning of the wheels is prevented,
even with PSM switched off.
Switching PSM back onfPress PSM OFF button.
PSM is switched on after a short delay.
The light-emitting diode in the button and the
multifunctional PSM light go out.
The on-board computer shows a message.

Practical Tips, Emergency Service
213
Snow chains
Caution!
Risk of damage to body, axle or brake com-
ponents.
fFit snow chains only to the rear wheels, and
only with the tire/rim combination listed in the
Technical Data.
To ensure adequate clearance between chain
and body, Porsche recommends only the use
of fine-link chains such as those approved by
Porsche.
fFollow instructions issued by the supplier of the chains.
Different states and countries have varying statu-
tory requirements regarding maximum speed.
Check with local authorities for possible restric-
tions.
fRemove chains as soon as the roads are free
of ice and snow.
Tire designations Due to new speed and load ratings for radial tires,
new designations have come into force for snow
tires for your Porsche.
The designation to be used for ZR tires is e.g.,
265/40 ZR 18 (Z = code letter for radial tires for
speeds above 150 mph / 240 km/h).

Vehicle Identification, Technical Data
263
fWhen changing tires or fitting new ones: Please observe the chapter “WHEEL BOLTS” on Page 222.
Danger!
Installation of sizes not authorized by
Porsche may have a dangerous effect on
the driving stability and could result in
severe personal injury or death.
fBefore mounting new tires, check with yourPorsche dealer about the current release status. Boxster S Tires Rim Rim offset Track
Summer tiresfront 235/40 ZR 18 91Y 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear 265/40 ZR 18 101Y XL 9 J x 18 H2 43 mm 60.2 in./1528 mm
or front 235/35 ZR 19 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46+ mm 60.0 in./1522 mm
Snow tiresfront 255/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S 9 J x 18 H2 43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “Y”) are minimum requirements.
Tire and rim sizes
Extensive tests are performed before specific tires and wheels are approved by Porsche. Your Porsche dealer has information
about approved tires and wheels and is happy to assist you. If aftermarket tires and/or wheels are installed which are not
approved by Porsche, the vehicle’s roadability and handling characteristics might be impaired. Since Porsche has no data on
such combinations, Porsche cannot stand behind the safety or durability of these aftermarket combinations.
* Snow chains Can be mounted only on the rear wheels; maximum speed 30 mph/50 km/h. Use only Porsche authorized fine-link
cross-type or edge chains. Snow chain clearance can be guaranteed only with the tire + rim combination marked.

Index
275
RRadiator fans .............................................. 171
Radio reception .......................................... 139
Rain sensor ................................................ 110
Range on remaining fuel ........................87
, 100
Rear fog light .....................................108, 249
Rear lid ...................................................... 132
Rear spoiler............................................62, 63
Rear view mirrors ......................................... 31
Rear window defogger.................................. 33
Rear wing
Retractable........................................... 62
Relays ........................................................ 226
Release button ........................................... 147
Remote control ............................................. 18
Replacement key .......................................... 17
Replacing bulbs .......................................... 239
Replacing wiper blades................................ 169
Retractable spoiler........................................ 62
Rims
Diameter ............................................ 215
Rim width ........................................... 215
Running in .................................................... 14
SSafety belts ..........................................42
, 199
Warning light ........................................ 43
Safety compliance sticker ........................... 258
Sealing set ................................................. 220
Seals, care of ............................................. 197
Seat ............................................................ 34
Adjustment ........................................... 34
Heating ................................................ 38Memory................................................36
Selector lever .............................................147
Selector lever position indicator ............ 81
, 149
Shifting gear ...............................................146
Shiftlock .....................................................147
Side lights ..................................................249
Side marker light ............................... 108, 248
Side vents ..................................................120
Snow chains .............................. 213
, 263
, 264
Snow tires ......................................... 212, 262
Sockets .....................................................124
Spare key .....................................................17
Spare wheel ...............................................264
Speed code letter .......................................214
Speed control .............................. 76
, 113
, 114
Speed limit .......................................... 88, 214
Speedometer................................................78
Spoiler .........................................................62
Fixed ....................................................63
Retractable ...........................................62
Sport mode ..................................... 57
, 60, 61
Sports seat ..................................................34
Stability management system (PSM) ...............58
Starting ................................................. 67, 68
Starting and stopping the engine ....................67
Steering wheel
Adjustment ...........................................39
Buttons ................................................40
Lock ................................. 67
, 68, 69, 70
Rocker switches..................................147
Toggle switches ..................................147
Stopwatch ....................................................92
Storage options ..........................................126
Storing your Porsche..................................200
Sun visors ....................................................41Switching passenger’s airbag on and off ........ 48
TTachometer ................................................. 79
Tail light ..................................................... 249
Tank .................................................. 178
, 179
cap ................................................... 179
Ventilation system.............................. 184
Telephone .................................................. 141
Temperature setting........................... 114, 117
Temperature, outside indicator ...................... 83
Test stand, measurements ............................ 60
Theft protection ........................................... 16
Tiptronic .................................................... 147
Indicator .............................................. 81
Tires ................................... 14
, 203
, 262
, 263
Checking pressure............................. 223
Inscription .......................................... 214
Loading information ............................ 216
Pressure................................ 5
, 206
, 263
Pressure plate.................................... 259
Sealant .............................................. 220
Sidewall ............................................. 214
Size .................................................. 214
Tires and tire care ...................................... 203
Tools ......................................................... 136
Towing .............................................. 254, 255
Track ........................................................ 262
Transmission ............................. 145
, 146
, 261
Fluid .......................................... 190, 266
Trunk entrapment ....................................... 132
Turn signals ......................................... 79, 109

276UUndercoating ............................. 182
, 196
, 197
VValves ........................................................ 210
Vanity mirror................................................. 41
Vehicle
Care .................................................. 191
Identifikation label............................... 258
Identifikation number ........................... 258
Laying up the car................................ 231
Putting into operation .......................... 232
Washing ............................................. 191
Ventilation .................................................. 117
Vents .................................................114
, 117
Viscosity, engine oil.................................... 174
WWarning messages ..................................... 102
Washer fluid .......................................184
, 266
Washer lever .............................................. 110
Washing ..................................................... 191
Weights...................................................... 267
Welcome Home Function............................. 108
Wheel ............................... 198
, 203
, 262
, 263
Bolts ............................................17, 222
Changing............................................ 224
Checking pressure..........................5, 223
Inscription .......................................... 214
Loading information............................ 216
Pressure plate .................................... 259
Sidewall ............................................. 214Size ................................................... 214
Tire pressure ................................. 5
, 206
Tire sealant ........................................ 220
Windows ............................... 25
, 28, 154
, 196
Washer nozzles................................... 110
Washer system .......................... 184, 266
Windshield wipers .............................. 110, 169
Replacing ........................................... 169
Windstop .................................................... 161
Winter driving
Battery ............................................... 230
Jump lead starting.............................. 236
Winter operation
Coolant .............................................. 170
Locks................................................. 193
Seals ................................................. 197
Snow chains ....................................... 213
Tires .................................................. 212
Washer fluid........................................ 184
Wiper blades....................................... 169